Also there is nice real time graph on background.
Press Show Panel button to enable dashboard. You can drag floating window over the screen or double tap to open settings. See video and screen-shots for details.

Tips:
Customize the appearance of the panel using color picker dialogs. Also you can adjust transparency and size of the panel in Sliders section.
If you want the panel did not receive touch events, just select the “ICS hack” box. If you Android 4.0 user, you also may want to turn it on. Since in ICS the status bar is drawn on top of all. Even on top of Cool Tool:)
Tons of gauges could drain your battery very quickly. Uncheck the features that you do not need. Btw, Cool Tool went to sleep and do not draw anything when your display turns off. It is for powersave.
Warning! “Show most resource-intensive process” feature is pretty resource-intensive You should use it only if you really need it.
If you want to hide Cool Tool panel in specific app, just select that app in Black List tab.